How to Design a Forest Garden and Grow Mushrooms Outdoors - An Experiment | PITH + VIGOR by Rochelle Greayer

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How to Design a Forest Garden and Grow Mushrooms Outdoors – An Experiment

7/24/2022

After ten years of staring down a large pile of hardwood logs left for me after the installation of a new home septic system, I’ve resolved to make something of this eyesore. A forest garden and an attempt at growing mushrooms outdoors.

I’m a classically trained garden designer. (That is to say, I studied in England and among many more useful things, I learned from the best about how to design 20-foot deep herbaceous borders and other stuff most normal people don’t really want)

Running contrary to my formal training, notions of hügelkultur* and permaculture have recently fascinated me as I try to make manageable my own three-acre garden.

Syntropic and permaculture farming practices are two approaches to garden-making that couldn’t be more different to a traditional english approach. I find my biggest struggle in marrying the mindsets, its resolving the part about aesthetics. One is all about making things pretty in the most planned, pruned and primped of ways. The other relies on seeing beauty in something that most would call a weedy, chaotic, mess.

So as I make plans for my pile of rotting logs, I’ve set a goal of experimenting with mushrooms and perennial vegetables. I want to create a gourmand’s delight. I’ll be trying out plants and methods that should do the hard work for me and the ecosystem. But (here is the tricky part) I want to figure a way to make it look like something I would proudly share as an attractive example of garden design.

Can it be done?
Let the experiments begin.

Diagram of a mushroom and forest garden
Growing mushrooms on the log pile

If gardening is about wrestling around with Mother Nature to sculpt something of self-perceived beauty while absorbing her sometimes gut-busting blows with grace and patience, then it seems to me that beautiful mushroom cultivation might be like entering an ultimate fighting championship.

Not surprisingly I have had to deal with a couple of sucker punches to my initial plans. First, my old pile of logs isn’t actually the mushroom growing haven I thought it would be. And second, mushrooms don’t grow where you plant them (so much for my ideas about color coordinating companion plants). It turns out my old logs are pretty useless to most mycelium. In general, mushrooms want fresher, more nutrient rich wood. But, I am undeterred, and have instead decided that the existing logs will largely form the base of the hügelkultur*.

Planting a Forest garden

We have plenty of newly fallen trees. The other half of the property is woodlands—as well as a constant supply of garden clippings which we will impregnate with mushroom spores. So the evolved strategy is to bury the bottom half (at least) of the logs with soil. This will create a base growing medium for other foodie treats like ramps, ferns (for fiddleheads), Solomon’s seal (harvest young shoots in early spring, prepare and eat like asparagus), elderberries (I can’t wait to make home brewed cordial), sorrel and wild strawberries. We will fill the top with pockets of saw dust, coffee grounds, compost and other growing medium that will please a variety of mushrooms.

As I prepare to implement, I am faced with the third harsh reality of my experiment. This will take time. Not only will the mushrooms potentially run and grow not where I spread or inoculated with spore, but where I least expect, and it might take months, even years, before they bloom with the fruit I seek. The rest of the time I must trust that they are growing and spreading via vast underground mycelial networks—invisible to my naked eye. The general faith of a gardener is legendary, but this is pushing even my limits.

* Hügelkultur is a composting process employing raised planting beds constructed on top of decaying wood debris and other compostable biomass plant materials. The process helps to improve soil fertility, water retention and soil warming, thus benefiting plants grown on or near such mounds. (Wikipedia)

Choosing forest perennials to accompany your mushroom garden:

Making a forest garden Allium tricoccum - Ramps, wild leeks

Allium tricoccum – Ramps, wild leeks

Ramps are native to moist woodlands. People like them because they are a delicate blend of onions and garlic that you can even eat raw.

Start with seeds – a colony will gradually form over a few years. Less patient gardeners can also find bulbs (in season) to get a jump on production.

fiddlehead ferns for a food forest

Athyrium filix-femina – Lady fern , Osmunda regalis – Royal fern, Polystichum munitum – Western sword fern and Osmunda cinnamomea – Cinnamon fern

These ferns are all sources for tasty fiddleheads in the spring, and will provide lush foliage in the summer and fall. A few already grow here, so I can transplant them from my woods to get things started.

 Fragaria viginiana or vesca - Wild strawberries-  groundcover for a food forest

Fragaria viginiana or vesca – Wild strawberries

Due to their short lifespan after picking, these are rare in markets. Wild strawberries are more flavorful than commercially cultivated varieties, so the best place to get them is from your own garden. The fruits are much smaller and the plants can be a great groundcover.

 Rumex acetosa - Garden sorrel

Rumex acetosa – Garden sorrel

The leaves of perennial sorrel are refreshingly lemony. Add them to soups and salads. The juice of the plant removes stains from linen and natural fibers (bonus!). These also grow where I live and so planting some from seed will be easy. I find their russet brown seed heads very attractive and an interesting contrast to an otherwise green selection of plants.

Polygonatum ssp – Solomon’s seal

Polygonatum ssp – Solomon’s seal

Varieties can range in height from 8 inches to 4 feet. Grown largely for its beautiful arching stems, textural leaves and herbal qualities; leaf coloring can range from silver to green and also includes variegated varieties.

Sambucus nigra ‘Black Lace’

Sambucus nigra ‘Black Lace’

Not only a source of harvestable flowers, the ‘Black Lace’ variety will also give depth and color with its dark purple leaves. The fruits are also edible but only after cooking and they are often made into jams.

Growing Mushrooms outdoors in the forest garden:

Growing mushrooms with indoors kits is a popular way to experiment with cultivating fungi. But I’m not into moldy logs in my living room.

Plenty of mushrooms grow in my garden already and some of them I know to be edible. I regularly get morels in my front beds and between the stones of my front walk.

making a mushroom garden - Lentinula edodes - Shiitake

Lentinula edodes – Shiitake

Shitake prefer the dead or dying wood of broadleaf trees. It is best to use logs that haven’t made ground contact as native soil microbes can compete with shiitake mycelium. Alternatively, shiitake mycelium can be grown on bags filled with fresh sawdust.

makign a mushroom garden: Stropharia rugoso-annulata - Wine cap mushrooms

Stropharia rugoso-annulata – Wine cap mushrooms,

Native to New England, wine caps can be massive (up to 5 pounds). They are typically found growing on old compost heaps in a shady area. Truly magical, they often look like rocks, are cold and firm to the touch, and they can grow fast. They can sometimes reach full maturity and size between dawn and dusk. Inoculate newly disturbed soils rich in wood debris by making a moth patch—a lens-shaped patch of woodchips.

making a mushroom garden - Pleurotus ostreatus - Oyster mushrooms

Pleurotus ostreatus – Oyster mushrooms

These are the most common edible mushrooms, found on hardwoods. Grow on logs and stumps of alder, cottonwood, poplar, oak, birch, beech and aspen among others. After incubating, the logs may be partially buried horizontally to conserve water during fruiting. Spent oyster kits are a mass of sticky white mycelium typically grown in straw or wheat. I am adding these remains to my mushroom garden. You can use them to inoculate a compost heap or stuff into cracks between pieces of wood (adding sawdust, coffee grounds, and straw to help feed and maintain moisture).

making a mushroom garden : Agaricus bisporus - Grow Portobello mushrooms

Agaricus bisporus – Portobello mushrooms

Portobellos grow in mounds of inoculated leached cow manure or compost. Use cover crops to promote growth. Portobellos like to grow with other plants. Pair with kale, zucchini, squash, potatoes, melons, or similar leafy green vegetables.

Morchella angusticeps - Black morels

Morchella angusticeps – Black morels

Morels are common mushrooms to hunt for because they can be a bit tricky to cultivate. Grain spawn—a sterile culture grown on grains—can be grown on leached cow manure or morels are often grown in burn areas and will colonize ground that has been charred.

Making a mushroom garden -growing lions mane mushroom

Hericium erinaceus – Lions mane mushrooms

Lions mane mushrooms taste like shrimp or lobster when cooked. These mushrooms are pure white until aged. When they begin to turn brown at the top is the perfect time to harvest. They prefer the wood of dying or dead oak, beech, or maple trees. To cultivate, use 4-foot inoculated logs buried in the ground.

Other mushroom growing posts:

Mushrooms to save bees

Photo Credits:

Ramps – Charles Kinsley (CC by-SA 2.0), Strawberries – Alexander Vasin (CC by 2.0), Polygonatum – Blueridgekitties (CC by-NC-SA 2.0), Fern – Alison Nihart (CC by-SA 2.0), Rumex Acetosa courtesy of Edible Landscaping, Sambucus nigra ‘Black Lace’ – Courtesy of Proven Winners

Mushrooms: All images via 123rf.com with the exception of Wine caps – Ann F. Berger (CC by SA-3.0), Portobello – Ron Pastorino – (CC by SA-3.0)

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Growing a gourmand's delight. Learn more about edible perennials and mushrooms that you can grow in the woods.
How to grow mushrooms and design a forest garden

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